Bracket insulator



May 29, 1928.

W. C. BANKS ET AL BRACKET INSULATOR Filed Juiy so, 1923 k/VVENTORS ar 7% wvfiw-- ATTORNEYS Patented May 29, 1928.

WILLIAM c, Ennis, E JER Y m, NE JERSEY, AND ERNEST E. SCHMID, or norms,

PATENT OFFICE.

. NEW YORK.

BRACKET INSULATOR.

Application filed July 30,

This invention relates to bracket insulators and more especially to the means for attaching the insulator bracket to the lag bolt or to its support.

It is an ob ect of this invention to provide a method and means for attaching the bracket to the lag bolt and support, whereby the fastening of the lag bolt to the support and the attaching of the bracket thereto is facilitated.

Another object is to provide an improved means for holding the insulator in the bracket whereby the insulator may be quickly removed from or inserted in the bracket. v

Another object of the invention is to improve the construction of the insulator by providing the mating parts thereof with a plurality of interfitting tongue and groove connections, whereby flashovers from the wire to the bracket will be more effectively prevented.

Heretofore it has been customary to cast the lag bolt integral with the bracket or to attach the bracket permanently to the lag bolt whereby it was necessary to turn the bracket with the bolt to force the bolt into the support.

In our invention we provide a means for detachably connectin the lag bolt and the bracket whereby the olt can be driven into the support before the bracket is slipped onto the bolt and finally driven home by turning the bracket which is provided with a wrench socket to fit over the bolt head.

In the drawings which illustrate a preferred form of the invention.

Fig. 1 is a part sectional plan view of the insulator.

Fig. 2 is a side elevation of the insulator.

Fig. 3 is an end view of Fig. 2, looking toward the right.

Fig. 4 is an elevation of one of the insulator elements.

In the embodiment illustrated the insulator elements 1 and 1 are clamped in the bracket 2 between the semi-circular members 3 and 4. The member 3 as illustrated is integral with bracket 2 and is provided at its outer end with a tongue 5 which is turned outwardly from the body of the member. The detachable member 4 is provided with an outwardly turned end 6 which carries a slot 7 which fits over the tongue 5 to clamp 1923. Serial Nd. 654,552.

the outer ends of members 3 and 4 together. The inner end of member 4 is provided with a hole 8 which registers with a hole 9 in the bracket 2, and through which the screw bolt 10 is fitted to hold the insulator in the bracket.

The insulator elements 1 and 1 may be of any desired exterior shape and are provided with an annular groove 11 toaccommodate the clamping members 3 and 4. The wire hole 12 is illustrated as being of oval shape and having longitudinal ridges 13 to grip the insulation on the wire; this shape can, of course, be varied to accommodate the insulator to any particular shape of a. wire. Each of the members 1 and l is provided at each side of the wire hole 12 with tongues 14 and l l 'and grooves 15 and 15, which are fitted together in the complete insulator as shown in Fig. 1, to increase the fiashover value of the meeting faces of the insulator.

The base of the bracket 2, is enlarged at 16 and 17 to provide proper means for securing the bracket to the lag screw and to its support. The enlargement 17 is hollowed out at 18 to form a socket for the head 19 of the lag bolt 20. The socket is of the same shape as the head of the bolt and is substantially the same size so that it removably fits over the head of the bolt like a soc et wrench fits over a nut, to enable the bolt to be turned by using the bracket a wrench. The winged flange 21 at the base of the bracket is notched at 22 to accommodate the neck of the bolt and is provided with holes 23 for auxiliary screws or other securing means.

In attaching the bracket to the support to bolt is first driven into the support a substantial distance before the bracket is applied to the bolt. Then the socket 18 is slipped over the head 19 of the bolt, the neck of the bolt slipping into notch 22 of the flange 21, the bracket may then be turned by inserting a rod or other suitable lever into the hole 24 in the enlargement 16, to screw the bolt 20 home, after which suitable screws or the like may be put through the holes 23 to hold the bracket firmly on the support.

In compliance with the law, we have shown and described in detail one embodi ment of our invention; however it is to be understood that the invention is not limited to the embodiment shown or the details described unless-sofllimitedin-the appended claim. Y 1 I What we claim is: The method of i attaching en article to a support, said article haiving a radia-l' slot at the end and a non-circular cavity adjacent to said slot, which comprises driving. user-aw bolt part way into the support, said screw bolt having a radiallyzextending head, up plying the article to the bolt with the slot around the shank of the bolt and with the non-circular cavity in non-rotative engagement-withthe head of the=bolt,'whereby the bolt may be turned by means of the article, and then screw' in the bolt by means of tliefnr ti'cle hnd dlhmping apo'r'ti0n of the article between the head of the bolt and the su port.

bigned by us this 26th day of July, 1923. i WV. C. BANKS.

E. E. SCHMID. 

